I am curious about the timeline for a 1L summer job. When do these usually start and when do they end? The week after finals? Two weeks after? The Monday following the week of exams? That weekend? Does it depend?

I am thinking about planning a large life event for next summer, and would need at least 7 days for this event and what follows. Would I be able to find this time? What would a employer think if I asked to start late?

This depends entirely on where you work your 1L summer, but *typically* there's some time in between the last final (and writing competition) and the start date. I believe I had three weeks in between during my 1L summer, and two weeks in between during my 2L summer. Both were Gov't jobs.

There is no one-size-fits-all answer here; it is going to depend completely on where you work. With that said, I think if you plan your event and let the firm/agency/solo/coffee shop, etc. know ahead of time, I can't imagine they wouldn't be willing to work with you considering you're only asking for a week.